To install this, you have to first insert it perpendicularly to the center two main strings. After this, you just twist the dampener counter-clockwise and that will get the two center mains into their slots. The outer two slots then just need to have the string pulled off to the side and then slide on.
http://www.tennisexpress.com/category.cfm/tennis/tennis-vibration-dampenersNot all dampeners are built the same and they're not all as easy to put on as othe...
The International Tennis Federation or the ITF dictates the placement of your vibration dampener. You can place it in one of two places. Either below the bottom cross string or above the top cross string.
Move one string aside with your other hand and insert the dampener. Slide the dampener up or down on the strings to get it to the middle of the area between the throat or head and the first string. Long Dampeners. Place the dampener against the strings where you want to put it without inserting it to see where you'll need to start weaving.
A quick how-to installation video for the ADV Tennis Sorb Dampener.
If you want to install a round dampener, you put it with the notch in one of the two middle main strings at the throat of the racket. Then pull the second string in the opposite direction until the dampener snaps into place. Finally, you push it upwards until the first cross string is reached.
Given there aren't many areas on a racquet you can install a dampener without it negatively interfering with the ball, you wouldn't think there'd need to be any rules on it. However, according to the USTA's Official Rules of Tennis and the ITF rulebook, a vibration-damping device “may only be placed outside the pattern of the crossed strings” (Rule 4, Case 3).
How to Install Worm Dampeners. The steps to install a worm dampener will vary depending on the design. Most worm dampeners are attached as followed: Again, all steps below should be carried out below the first horizontal/ cross string of the racket. Step 1. Attach the left side of the dampener to a string towards the left side.
More Tennis Dampener Installation images